-50

-25

0

25

50

75

100 125

80

85

90

95

100

105

VDD=1.8V

VDD=3.3V

VDD=5V

-50

-25

0

25

50

75

100 125

90

95

100

105

110

TEMPERATURE (°C)

-200 -150 -100 -50

0

50 100 150 200

0

3

6

9

12

15

18

VOSPH ( V)

UNITS TESTED > 5000

-2.5 -2.0 -1.5 -1.0 -0.5 0.0 0.5 1.0 1.5 2.0 2.5

0

5

10

15

20

25

30

35

TCVOSPH ( V/°C)

UNITS TESTED > 5000

25

45

65

85

105

125

-500

-400

-300

-200

-100

0

100

200

300

400

500

TEMPERATURE (°C)

INP=1.65V

Average

Average -31

Average +31

25

50

75

100

125

-5

-4

-3

-2

-1

0

1

2

3

4

5

TEMPERATURE (°C)

INP-VCM = -100mV

INP-VCM = 100mV

Average

Average -31

Average +31

9

LMP91200

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SNAS571E – JANUARY 2012 – REVISED FEBRUARY 2016

Product Folder Links: LMP91200

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Copyright © 2012–2016, Texas Instruments Incorporated

Typical Characteristics (continued)

Unless otherwise specified, TA= 25°C, VS= (VDD – GND) = 3.3 V, VREF = 3.3 V.

Figure 7. pH Buffer Input Bias Current

vs Temp - Device ON

Figure 8. pH Buffer Input Bias Current

vs Temp - Device OFF

Figure 9. pH Buffer Input Voltage Offset

Figure 10. pH Buffer TCVOS

Figure 11. pH Buffer DC CMRR

vs Temperature

Figure 12. pH Buffer DC PSRR

vs Temperature